... . Prompt quotation; 3.Good quality and service; Specifications Standar Helical spring Washer Process Capablilities Standard ISO, GB, DIN, JIS, ANSI, BSW, ASME ... , 9.8, 10.9, 12.9 etc. Size M0.8~M12 Material Stainless, Steel,Brass, Steel,Bronze, Iron,Aluminum,Carbon steel ... future business relationships and achieving mutual success! certificate Standar Helical spring Washer